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Naming Compounds

Naming Compounds. Objectives: Name ionic and covalent compounds based off of chemical formulas. Give a chemical formula based on a chemical name. Oxidation Numbers. The charge of an ion # of electrons gained or lost Only in ionic compounds Cation —positive Anino --negative.

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Naming Compounds

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  1. Naming Compounds Objectives: Name ionic and covalent compounds based off of chemical formulas. Give a chemical formula based on a chemical name.

  2. Oxidation Numbers • The charge of an ion • # of electrons gained or lost • Only in ionic compounds • Cation—positive • Anino--negative

  3. How to name Ionic Compounds • Write the name of both elements, cation first • Change the anion’s ending to –ide • Write the name of the polyatomic ion • If an ion has various oxidation numbers (transitional metals), write the oxidation number in parentheses using roman numerals. (I, II, III, IV, V, VI, VII, VIII, IX, X)

  4. Ionic compounds • NaBr • Sodium bromide • NaCl • Sodium chloride • CaCl • Calcium chloride • FeCl3 • Iron (III) chloride

  5. Ionic Formulas • Write each ion. Put cation first • Overall charge must equal zero. • If charges cancel, just write the symbols • If not, crisscross the charges to find subscripts • Use parentheses when more than one polyatomic ion is needed. • Roman numerals indicate the oxidation number

  6. Give the Formula • Potassium chloride • Magnesium bromide • Copper (II) chloride • Calcium oxide • Iron (III) oxide

  7. Common Polyatomic Ions • Ammonium • NH4+ • Hydronium • H3O+ • Bicarbonate • HCO3- • Cyanide • CN- • Hydrogen sulfate • HSO4- • Hydroxide • OH- • Nitrate • NO3- • Nitrite • NO2-

  8. More… • Perchlorate • ClO4- • Permanganate • MnO4- • Carbonate • CO32- • Chromate • CrO42- • Dichromate • Cr2O72- • Hydrogen phosphate • HPO42- • Sulfate • SO42-

  9. More… • Sulfite • SO32- • Thiosulfate • S2O32- • Phosphate • PO43-

  10. Naming Ionic Compounds with Polyatomic Ions • Na2CO3 • Na2SO4 • Calcium nitrate • Magnesium nitrate • Aluminum chlorate

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